Radon detector



FIG. 1 a front, right, perspective view showing my new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a back side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrate portions of the radon detector and form no pan of the claimed design. 

CLAIM The ornamental design for a radon detector, as shown and described. 